JP2006219044A - Front curtain airbag device, and airbag system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a front curtain airbag device, capable of protecting an occupant to a front impact at the time of a collision to the utmost, and provide an airbag system using the device. <P>SOLUTION: This device comprises a front curtain airbag body 11 comprising a bag member formed by sewing base fabric, and provided close to an upper part of a windshield 2 of an automobile to expand and develop along the windshield, and an inflator 15 to inject pressure fluid for expanding and developing the front curtain airbag body 11. The front curtain airbag body 11 is disposed on the side of the windshield 2 over a sun visor 8 to sunlight through the windshield 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a front curtain airbag device and an airbag system for ensuring safety in front of an occupant during a frontal collision of an automobile or the like.

  2. Description of the Related Art Conventionally, various airbag devices for protecting a passenger's body from an impact at the time of an automobile collision or the like have been used.

  For example, in a driver's seat, a driver's seat airbag that inflates and deploys from the center of rotation of the steering wheel to the driver's side (see, for example, Patent Document 1), and a passenger's seat airbag device that inflates and deploys from the instrument panel to the passenger's seat side ( For example, refer to Patent Document 2), and various other airbag devices such as a side airbag device and a curtain airbag device are used.

Japanese Patent No. 3028524 (FIG. 2) JP-A-9-48305 (FIG. 17)

  An object of the present invention is to provide a front curtain airbag device and an airbag system using the front curtain airbag device capable of ensuring occupant protection against a frontal impact at the time of a collision.

  In order to achieve the above object, a first invention comprises a front curtain airbag main body comprising a bag body sewed on a base fabric and provided in the vicinity of an upper portion of a windshield so as to inflate and deploy along a windshield of an automobile. And an inflator for ejecting a pressure fluid for inflating and deploying the front curtain airbag main body.

  As a result, when the front curtain airbag body supplied with pressure fluid from the inflator is inflated and deployed along the windshield from near the top of the windshield, the front space of the occupant is almost completely the same as the windshield or the front exterior space. Therefore, the head of the occupant can be protected and the occupant can be securely held in the passenger compartment, and the occupant can be fully protected against a frontal impact in the event of a collision.

  According to a second aspect, in the first aspect, the front curtain airbag body is disposed in the vicinity of the sunshade member against solar radiation through the windshield.

  As a result, the front view of the occupant is not obstructed even during normal operation while the sunshade member is provided, and the inflating and unfolding operation along the windshield can be performed smoothly during a collision.

  According to a third aspect, in the second aspect, the front curtain airbag body is disposed on the windshield side from the sunshade member.

  Thus, by arranging the sunshade member on the occupant side, the sunshade member can be prevented from obstructing the inflating and deploying operation along the windshield of the airbag body.

  According to a fourth invention, in any one of the first to third inventions, there is provided a guide means for guiding the front curtain airbag body while restraining the direction so as to be inflated and deployed along the windshield. It is characterized by.

  Thereby, even when the windshield is crushed, the front curtain airbag main body can be inflated and deployed in a predetermined arrangement reliably and smoothly without coming out of the vehicle.

  In a fifth aspect based on the fourth aspect, the guide means pulls the front curtain airbag body along the windshield when the front curtain airbag body is inflated and deployed by the pressure fluid from the inflator. It is a traction drive mechanism that performs.

  Thereby, the expansion | deployment deployment in the direction along the windshield of a front curtain airbag main body can be performed reliably and rapidly.

  In a sixth aspect based on the fifth aspect, the traction drive mechanism generates a traction drive force based on the pressure fluid from the inflator.

  As a result, the front curtain airbag body that is inflated and deployed can be pulled and driven quickly and elastically.

According to a seventh invention, in any one of the first to sixth inventions, a plurality of front curtain airbag bodies are provided in a vehicle width direction of an automobile, and the plurality of front curtain airbags are inflated and deployed. The main body is arranged so as to cover almost the entire area of the windshield in the vehicle width direction. This makes it possible to divide the front curtain airbag main body and reduce the amount of pressure fluid required for inflating and deploying alone. , Each can be quickly inflated and deployed, and the passengers can be reliably protected.

  According to an eighth aspect of the invention, in any one of the first to seventh aspects of the invention, the front curtain airbag body includes a base fabric in which conductive fibers having electrical conductivity or antistatic fibers having antistatic properties are woven. It is characterized by having.

  Thereby, local accumulation of static electricity in the front curtain airbag body can be prevented, and static electricity can be grounded and discharged from the entire front curtain airbag body.

  A ninth invention is characterized in that, in the eighth invention, an earth circuit is connected to the conductive fiber and electrically grounded.

  Accordingly, static electricity can be grounded and discharged from the front curtain airbag body via the ground circuit, and charging of the front curtain airbag body can be reliably prevented.

  In order to achieve the above object, the tenth invention comprises a driver airbag main body provided on a steering wheel of an automobile comprising a bag body sewn on a base fabric, and a bag body sewn on a base fabric. A front curtain airbag body provided in the vicinity of the upper portion of the windshield so as to be inflated and deployed along the windshield of the automobile; first inflator means for ejecting pressure fluid for inflating and deploying the driver's airbag body; And a second inflator means for ejecting a pressure fluid for inflating and deploying the curtain airbag main body.

  In this way, the driver's airbag body that is inflated and deployed can alleviate the driver's forward impact, and the inflated and deployed front curtain airbag body protects the driver's head and ensures that the driver's interior It is possible to protect the driver against a forward impact at the time of a collision.

  Furthermore, in order to achieve the above object, an eleventh invention comprises a passenger's airbag body provided in an instrument panel of an automobile, comprising a bag body sewn on a base fabric, and a bag body sewn on a base fabric. A front curtain airbag body provided near the upper portion of the windshield so as to be inflated and deployed along the windshield of the automobile, and a third inflator for ejecting pressure fluid for inflating and deploying the passengers airbag body And a second inflator for ejecting a pressure fluid for inflating and deploying the front curtain airbag body.

  As a result, the front passenger's front shock can be mitigated by the inflated and deployed passengers airbag body, and the front curtain airbag body inflated and deployed can protect the passenger's head and ensure the passenger's seat It can be held in the passenger compartment and the passenger seat occupant can be fully protected against a forward impact at the time of a collision.

  ADVANTAGE OF THE INVENTION According to this invention, the occupant protection with respect to a front impact can be ensured at the time of a collision.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a view of a front windshield airbag device according to the present embodiment and a vehicle interior windshield including an airbag system including the front curtain airbag device as viewed from the rear seat side. In FIG. 1, as a front seat facing the windshield 2, a driver's seat 3 is arranged on the right side in the figure, and a passenger seat 4 is arranged on the left side. An instrument panel 5 and a steering wheel 6 are provided in the front and rear directions along the traveling direction of the vehicle, and an instrument panel 7 is provided in front of the passenger seat 4. Further, a sun visor 8 as a sunshade member for solar radiation through the windshield 2 is provided in front of the driver's seat 3 and the passenger seat 4 at an upper position of the windshield 2.

  The front curtain airbag device 1 according to the present embodiment includes two front curtain airbag bodies 11 (two-dot chain lines: drawn out to the maximum) that are disposed near the sun visor 8 and closer to the windshield 2 than the sun visor 8. Middle state), two air cylinders 13 disposed below the windshield 2 in the A pillars 12 on the left and right of the vehicle body, and the traction wires 14 connecting the air cylinders 13 and the front curtain airbag 11 main body. And an inflator 15 that is disposed in the vicinity of each front curtain airbag main body 11 and is connected by piping so as to supply pressure fluid to the front curtain airbag main body 11 and the air cylinder 13, respectively.

  The front curtain airbag main body 11 is a bag body in which two substantially rectangular base fabrics having the same outer shape are overlapped and their peripheral portions are sewn, and is normally stored on the windshield 2 side from the sun visor 8. It is housed inside the box 16. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1 and shows a storage state of the front curtain airbag body 11. The storage box 16 is a box-shaped structure made of a rigid body such as metal. In FIG. 2, the storage box 16 is positioned on the rear side, a top plate 16a that is closely fixed to the indoor ceiling 17, a bottom plate 16b positioned below the top plate 16a. It has a rear side plate 16c, and the front side surface is open. The front curtain airbag body 11 is housed in an internal space surrounded by the top plate 16a, the bottom plate 16b, and the rear side plate 16c in a folded state.

  As shown in FIG. 3, the upper edge of the front curtain airbag body 11 in the deployed state is fixed along the upper edge of the windshield 2. Further, the base fabric of the front curtain airbag main body 11 is woven with a plurality of conductive fibers 18 having a plurality of conductivity in a vertically parallel arrangement as shown by a one-dot chain line in the figure. Is electrically connected to an earth circuit formed of a metal vehicle body or the like by a ground wire (not shown) (not connected to the inflator 15 so as not to interfere with the inflator 15), and finally grounded. Has been. This is a configuration for preventing the front curtain airbag main body 11 from being charged by static electricity, which will be described in detail later.

  As shown in FIG. 2, a synthetic resin cloth material 19 is stretched on the front side surface of the storage box 16, and the front curtain airbag main body 11 is inflated on the cloth material 19 from the inside of the storage box. A tear line (scheduled fracture line: not shown) that allows the front curtain airbag main body 11 to be inflated along the windshield 2 by tearing is formed. A hinge portion 20 is provided at the lower end of the rear side plate 16c of the storage box 16, and the plate-like sun visor 8 is connected to the hinge portion 20 at the lower end portion. As a result, the sun visor 8 can be pivoted in the vertical direction about the hinge portion 20, and is lowered when necessary (indicated by a broken line in the figure), so that the solar radiation from the windshield 2 can be seen against the driver's field of view. Can be blocked. Further, a fixture 21 for fixing the free end of the sun visor 8 is provided at the upper end of the rear side plate 16c.

  In FIG. 2, an inflator 15 (second inflator means) that is entirely cylindrical is provided above the A pillar 12 so that its longitudinal direction is substantially parallel to the longitudinal direction of the vehicle body. The inflator 15 is for suddenly generating and injecting combustion inflation gas in response to a control signal from a control unit (not shown), and can supply pressure fluid thereby to the front curtain airbag body 11 and an air cylinder 13 described later. As shown, they are connected by pipes (not shown).

  FIG. 4 is a view showing the air cylinder 13 in a cross section along the longitudinal direction. In FIG. 4, an air cylinder 13 is provided with a cylindrical cylinder body 22 and a piston 23 which can be slidably moved in the cylinder body 22. The piston 23 is disposed in the cylinder body 22 with an upper inflow chamber 24 and a lower part. It is provided so as to be hermetically partitioned from the discharge chamber 25. A pulling wire 14 is coupled to the upper end of the piston 23, and the pulling wire 14 is pulled out from the cylinder body 22 with the inflow chamber 24 sealed. The upper end of the cylinder body 22 is connected to the inflator 15 via a pipe 26, and the inflow chamber 24 is in communication with the inside of the inflator 15. An exhaust hole 27 is formed at the lower end of the cylinder body 22 through which the discharge chamber 25 communicates with the outside air.

  Further, an annular locking projection 28 is formed on the lower portion of the inner peripheral surface of the cylinder body 22, and a locking groove 29 that can be locked to the locking projection 28 on the outer peripheral side surface of the piston 23. Is formed. The outer peripheral edge portion of the lower end surface of the piston 23 is chamfered, and when the piston 23 slides swiftly toward the locking projection 28, the locking projection 28 rides up from the chamfering of the lower end surface of the piston 23. The piston 23 is slidably contacted with the outer peripheral side surface of the piston 23, and then locked in the locking groove 29 to fix the piston 23.

  With this configuration, the air cylinder 13 can rapidly push the piston 23 downward by causing the pressure fluid to rapidly flow into the inflow chamber 24 and drive the traction wire 14 with high tension. When the piston 23 is locked to the locking protrusion 28, the check valve has a structure of a check valve that fixes the pulling state of the pulling wire 14 without pulling back even if the inflow of the pressure fluid stops.

  The pulling wire 14 has an upper end coupled to the center of the lower end of the front curtain airbag body 11 (reinforced with a reinforcing cloth) through the A pillar 12, and the stroke of the piston 23 in the air cylinder body 22 is determined by the front curtain. The length is such that the lower end edge of the airbag body 11 can be pulled down to the lower end of the windshield 2. In FIG. 1, a state in which the front curtain airbag body 11 is being pulled down is shown by a two-dot chain line.

  In the front curtain airbag device 1 described above, when the inflator 15 ejects the pressure fluid in response to a command from the control unit at the time of a car collision, the front curtain airbag body 11 starts to inflate, and the cloth material of the storage box 16 19 cleaves along the tear line. Then, the front curtain airbag main body 11 expands downward from the storage box 16 above the windshield 2, and the air cylinder 13 that receives the pressure fluid from the inflator 15 operates to retract the pulling wire 14. Pull down the curtain airbag body 11.

  FIG. 5 is a view of the state where the two front curtain airbag bodies 11 are pulled down to the end when viewed from the rear seat, and FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. As shown in FIG. 6, the two front curtain airbag bodies 11 are pulled out in the front-rear direction along the inner surface of the windshield 2, and, as shown in FIG. Unfold to cover.

  The front curtain airbag device 1 of the present embodiment is configured on the premise that the front curtain airbag device 1 is reliably deployed in the illustrated arrangement, and for this purpose, a guide rail that guides the two front curtain airbag bodies 11. A pulling wire pulley or the like may be appropriately provided as an auxiliary. A tear line 30 (scheduled break line) that allows the pulling wire 14 to jump out on the inner surface of the A pillar 12 that houses the pulling wire 14 so that the front curtain airbag body 11 can be easily pulled in a desired direction. ) Is formed. In addition, arrangement | positioning of the air cylinder 13 is not restricted in the A pillar 12, You may arrange | position to another location suitably so that the front curtain airbag main body 11 may be pulled easily.

  In the above configuration, the pull wire 14 and the air cylinder 13 function as guide means for guiding the front curtain airbag body 11 while restraining the direction so as to inflate and deploy along the windshield 2. Even when the windshield 2 is crushed by the guide means, the front curtain airbag main body 11 can be inflated and deployed in a predetermined arrangement reliably and smoothly without coming off the vehicle.

  The guide means also functions as a traction drive mechanism that pulls and drives the front curtain airbag body 11 along the windshield 2 when the front curtain airbag body 11 is inflated and deployed by the pressure fluid from the inflator 15. is doing. Thereby, the expansion | deployment deployment in the direction along the windshield 2 of the front curtain airbag main body 11 can be performed reliably and rapidly. Further, the traction drive mechanism generates a traction drive force based on the pressure fluid from the inflator 15, so that the inflated and deployed front curtain airbag body 11 can be traction driven quickly and elastically.

  And since the front curtain airbag body 11 is provided in a plurality in the vehicle width direction of the automobile, the front curtain airbag body 11 can be divided to reduce the amount of pressure fluid necessary for inflating and deploying alone, Each can be rapidly expanded and deployed. Further, when the airbag is inflated and deployed, the plurality of front curtain airbag bodies 11 are arranged so as to cover almost the entire region of the windshield 2 in the vehicle width direction, thereby ensuring the protection of the occupant.

  The steering wheel 6 is provided with a known driver's airbag (driver's airbag main body) 9 that is deployed in a circle immediately before the driver (as shown by the dashed line in FIG. 1). In the event of a car collision, this is also inflated and deployed by a pressure fluid from a dedicated inflator (first inflator means) (not shown). In this example, a well-known passengers airbag (passengers air bag) that is deployed in front of the passenger in the passenger seat 4 (as shown by the two-dot chain line in FIG. 1) is also provided in the instrument panel 7. A bag body) 9 'is provided, which is also inflated and deployed by a pressure fluid from a dedicated inflator (third inflator means) (not shown) in the event of a car collision.

  As described above, according to the front curtain airbag device 1 of the present invention, when the front curtain airbag body 11 supplied with the pressure fluid from the inflator 15 is inflated and deployed along the windshield 2 from the vicinity of the upper portion of the windshield 2. The front space of the occupant can be cut off almost completely from the windshield 2 or the space outside the vehicle, so that the head of the occupant can be protected and the occupant can be securely held in the passenger compartment. It is possible to take all possible measures to protect passengers against forward impacts.

  Further, in the embodiment of the airbag system provided with the driver's airbag 9, the driver's airbag 9 inflated and deployed can alleviate the driver's front impact, and the inflated and deployed front curtain airbag. It is possible to protect the driver's head with the main body 11 and to securely hold the driver in the passenger compartment, and to further protect the driver against a forward impact at the time of a collision. Similarly, in the embodiment of the airbag system including the passenger's airbag 9 ', the passenger's front impact of the passenger seat 4 can be mitigated by the inflated and deployed passenger's airbag 9', and the inflation system is inflated. The deployed front curtain airbag body 11 can protect the head of the passenger in the passenger seat 4 and can securely hold the passenger in the passenger seat 4 in the passenger compartment. It is possible to take all possible measures to protect the passengers against the frontal impact.

  Further, the front curtain airbag main body 11 is disposed in the vicinity of the sun visor 8 against solar radiation through the windshield 2, so that the front view of the occupant is obstructed even during normal operation while the sun visor 8 is provided. In addition, in the event of a collision, the expansion and deployment operation along the windshield 2 can be performed smoothly. Further, the front curtain airbag main body 11 is arranged on the windshield 2 side of the sun visor 8, that is, the sun visor 8 is arranged on the passenger side, so that the sun visor is attached to the windshield 2 of the airbag main body 11. It is possible to prevent the expansion and deployment operation along the line from being hindered.

  In the above configuration, the front curtain airbag main body 11 includes a base fabric in which conductive fibers 18 having conductivity (or antistatic fibers having antistatic properties) are woven, whereby a front curtain airbag is provided. Local accumulation of static electricity in the main body 11 can be prevented, and static electricity can be grounded and discharged from the entire front curtain airbag main body 11. Furthermore, by having an earth circuit that is electrically connected to the conductive fiber 18 and is electrically grounded, static electricity can be grounded and discharged from the front curtain airbag body 11 via the earth circuit. The main body 11 can be reliably prevented from being charged.

[Static countermeasure configuration]
In the embodiment of the front curtain airbag device described above, the configuration for removing static electricity generated on the base fabric of the front curtain airbag body 11 is important, and the configuration for countermeasures against static electricity will be described in detail below.

  First, regardless of the above-mentioned front curtain airbag body, the base fabric constituting the general airbag body is mostly made of synthetic fiber, metal, and synthetic resin materials. It is hydrophobic and has an insulating property and is folded and stored in the cover. For this reason, considerable static electricity is generated between the synthetic fibers that are close to each other in the folded portion or the entangled portion of the airbag body due to vibration or shaking during driving of the automobile.

  The static electricity charged in the air bag body in this way gradually discharges when the automobile engine is stopped. However, if the automobile continues to operate, the static electricity charged in the air bag body increases and the static electricity in the module increases. Accumulated in a certain area, there is a risk of high-voltage spontaneous discharge occurring at unexpected times.

  On the other hand, many electronic devices are mounted on automobiles today. For example, the operating voltage in these electronic device packages is gradually reduced, and is easily affected by weak electromagnetic waves with respect to the elements in the package. For this reason, when the static electricity charged in the airbag body is discharged, the electromagnetic noise causes a malfunction in the computer of the automatic operation control system, resulting in a program error, malfunction in the navigation system and AV equipment, or in the audio system. Electrical interference, i.e. noise and image distortion, can cause discomfort to the passenger.

  Moreover, if the electrostatic charge voltage accumulated in the airbag body at the time of a car collision is high, there is a risk of discomfort to the passenger due to electrostatic discharge. Also, the occurrence of electrostatic discharge corona in the vicinity of an inflator that supplies a high-pressure fluid to the airbag body is not preferable in terms of ensuring smooth operation of the airbag apparatus.

  Therefore, the structure to prevent the static electricity generated in the airbag body is indispensable. In particular, when the surface treatment is applied to the airbag base fabric to provide high airtightness, the insulation is further increased. Therefore, there was a concern that large static electricity would be charged.

  Therefore, as described above, in the front curtain airbag device according to the present invention, the conductive fabric having conductivity is woven into the base fabric of the front curtain airbag main body 11, so that static electricity is generated in the base fabric. Since the static electricity charged by corona discharge of the conductive fiber can be neutralized, the static electricity can be removed from the front curtain airbag body 11. For this reason, the smooth deployment of the front curtain airbag main body 11 can be ensured at the time of a car collision, and even if the occupant touches the front curtain airbag main body 11 deployed, there is no discomfort.

And in order to give high conductivity to the front curtain airbag body 11 in this way, the atomized carbide or carbon fiber group smaller than several micron units as a high electrical conductive material is provided on a part of the core of the synthetic fiber bundle. When mixed with fiber, the volume resistivity value is smaller than about 10 ² Ω-cm, and when mixed with fine particles of carbide, energy consumption and ionization are caused by the tip discharge (corona discharge) of the conductor from the highly conductive fiber. The effect of neutralizing charged electric charge is obtained, and these highly conductive fibers are grounded to a grounding circuit such as a metal part of a vehicle body, thereby further improving the effect of suppressing electrostatic charging. It is. As evaluation of these antistatics, it can be considered that the effect is sufficiently exhibited when the frictional band voltage in an atmosphere of 20 ° C. and 40% RH is constantly 50 V or less.

  Below, the inventor will specifically describe the chargeability test conducted on the base fabric for the front curtain airbag main body 11 of the present invention having the above-described configuration and the conventional base fabric for airbag main body. The test method is based on JIS L 1094 (Testing method for charging properties of woven fabrics and knitted fabrics), and FIG. 7 is a diagram for explaining a rotary static tester used in JIS L 1094.

  In FIG. 7, the chargeability test of the airbag body base fabric is performed with a rotary static tester (owned by Fukui Industrial Technology Center, manufactured by Koa Shokai Co., Ltd.) based on the triboelectric charge measurement method defined in JIS L 1094. Measurement is repeated 5 times using a specimen that is cut to 100 x 120 mm and kept in an environment of 20% or less at 20 ° C for 24 hours in accordance with JIS L 1094. Three measurements are taken excluding the maximum and minimum values. The average value is adopted to show the result. The cotton cloth subjected to the friction test is specified in JIS L 0803.

First, a ground circuit was formed in an inflator attachment hole that was subjected to high conductivity processing in a sewing process using a synthetic fiber (nylon 66) sewing thread of 1400 denier generally used for a base fabric for an airbag body. For imparting high conductivity, carbide (grounded with an electric resistance of about 10 ⁻² Ω-cm or less) pulverized into fine particles (unit of 1 to 10 μm) in the single yarn polymer molding stage is kneaded to the fiber core to 5%. Invented, artificially twisted yarns and blended yarns entangled with ordinary synthetic fiber materials were used.

  A fabric obtained by sewing high-conductivity fibers in an arbitrary direction from what is conventionally used to fabricate an airbag body conventionally used by sewing with these high-conductivity sewing threads has a size of 150 × 150 mm. The specimen for a test was obtained by cutting.

  As shown in FIG. 7, in the chargeability test, the driving force of the motor 54 is transmitted via the V-belt 55, whereby a rotating drum (constant speed rotation) with a test piece (specimen) 57 attached via a metal holder 56 is obtained. While the body 50 was rotated, it was rubbed for 60 seconds by a friction cloth (cotton cloth) 52 supported by a tension load metal belt 56 with one end fixed and a load 51 applied to the other end. The electrostatic charge voltage was measured by a power receiving unit (detector) 53.

  FIG. 8 is a result of the chargeability test of the airbag body base fabric performed by the rotary static tester shown in FIG. 7, and the results of the example and the comparative example using the front curtain airbag body base fabric of the present invention are shown. Indicates. In the determination shown in FIG. 8, the case where the result of the charge test does not satisfy 50V or less is indicated by x, and the case where the result is sufficiently satisfied below 50V is indicated by ◎.

  (Example 1) A high conductive fiber bundle 1400 denier was sewn for every 25 mm of base fabric, and a normal washing and drying process was performed to dry naturally to prepare a test piece.

  (Example 2) Under the same conditions as described above, a 900 denier ring was sewn and sewn up, and then a silicon base emulsion was applied with a comma coater to give a coating treatment, followed by drying at 200 ° C. for 15 seconds to prepare a test piece.

  In (Example 3), in addition to the above-mentioned conditions, 900 denier ring stitching is performed, and then a two-component mixed type silicone base elastomer is applied by a knife coater, followed by a coating treatment, followed by drying at 200 ° C. for 15 seconds. A test piece was prepared.

  (Comparative Example 1) When a base fabric is driven in a water jet loom, it is normally sewn with a 1400 denier ring without applying conductive fibers or antistatic treatment, and then a two-component mixed type silicon base elastomer is applied by a knife coater. Then, a coating treatment was performed, and dry curing was performed at 200 ° C. for 15 seconds to prepare a test piece.

  (Comparative Example 2) A commercially available non-coated airbag fabric was used, and it was cut from a product made by ring-sewing with a 1400 denier sewing thread without using a sewing thread made of high-conductivity fibers and tested. A piece was made.

  (Comparative Example 3) A test piece is prepared from a product that is made by commercial sewing with 900 denier sewing thread without using a sewing thread made of highly conductive fibers, using a commercially available non-coated airbag fabric. did.

  (Comparative Example 4) was woven by a commercially available water jet weaving method, then cut from a silicon elastomer-coated and heat-shrink stabilized treatment at 200 ° C. for 15 seconds, and a 900 denier sewing thread A test piece was prepared by sewing.

  (Comparative Example 5) is a non-coated fabric woven by a commercially available Lapier method of weaving, and was subjected to three times of washing treatment and cut naturally dried, and was sewn with 900 denier sewing thread to prepare a test piece. .

  As shown in the results of FIG. 8, in any of the comparative examples, the amount of electrostatic charge is much higher than the 50 V level that satisfies the standard, and it is clear that the chargeability is strong. On the other hand, in any of the embodiments according to the present invention, it is confirmed that the maximum band voltage in the warp direction and the maximum band voltage in the weft direction are lower than 50 V at which the effect of preventing the band voltage is steadily obtained. did it.

  As described above, the maximum frictional band voltage of the airbag fabric measured by the frictional band voltage measurement method stipulated in JIS L 1094 is made smaller than 50 V, so that the influence of charging of the fabric of the front curtain airbag body 11 is affected. Can be reduced.

  Although the description of the embodiment of the front curtain airbag device of the present invention has been completed above, the specific configuration of the above-described embodiment does not strictly limit the content of the present invention, and the details of the present invention are intended for details. Of course, it can be changed in various ways.

It is the figure which looked at the front curtain airbag apparatus of one Embodiment of this invention and the vehicle interior windshield periphery provided with the airbag system containing the same from the rear seat side. It is sectional drawing along the II-II line in FIG. 1, and is a figure which shows the accommodation state of a front curtain airbag main body. It is a figure which shows the arrangement | positioning state of the expansion | deployment state of a front curtain airbag main body, and the weave arrangement | positioning of the conductive fiber in the base fabric. It is a figure which shows an air cylinder in the cross section along a longitudinal direction. It is the figure which looked at the state which pulled down two front curtain airbag bodies to the last from the backseat. It is sectional drawing along the VI-VI line in FIG. It is a figure explaining the rotary static tester used by JISL1094 (The charging property test method of a textile fabric and a knitted fabric). It is a table | surface which shows the charging property test result of the base fabric for airbag main bodies implemented with the rotary static tester shown in FIG.

Explanation of symbols

1 Front curtain airbag device 2 Windshield 8 Sun visor (Awning member)
9 Driver's airbag 11 Front curtain airbag body 13 Air cylinder (guide means, traction drive mechanism)
14 Pull wire (guide means, pull drive mechanism)
15 Inflator 18 Conductive fiber

Claims (11)

A front curtain airbag body provided in the vicinity of the upper portion of the windshield so as to be inflated and deployed along the windshield of the automobile,
A front curtain airbag device comprising: an inflator that ejects a pressure fluid for inflating and deploying the front curtain airbag main body. The front curtain airbag device according to claim 1,
The front curtain airbag device according to claim 1, wherein the front curtain airbag body is disposed in the vicinity of a sunshade member for solar radiation through the windshield. The front curtain airbag device according to claim 2,
The front curtain airbag device is characterized in that the front curtain airbag body is disposed on the windshield side with respect to the sunshade member. The front curtain airbag device according to any one of claims 1 to 3,
A front curtain airbag device comprising guide means for guiding the front curtain airbag main body while constraining its direction so as to inflate and deploy along the windshield. The front curtain airbag device according to claim 4,
The guide means is a traction drive mechanism that pulls and drives the front curtain airbag body along the windshield when the front curtain airbag body is inflated and deployed by the pressure fluid from the inflator. Front curtain airbag device. In the front curtain airbag device according to claim 5,
The front curtain airbag device according to claim 1, wherein the traction drive mechanism generates the traction drive force based on a pressure fluid from the inflator. The front curtain airbag device according to any one of claims 1 to 6,
A plurality of the front curtain airbag bodies are provided in the vehicle width direction of the automobile, and are arranged so as to cover substantially the entire area of the windshield in the vehicle width direction with the plurality of front curtain airbag bodies when inflated and deployed. A front curtain airbag device characterized by comprising: The front curtain airbag device according to any one of claims 1 to 7,
The front curtain airbag main body includes the base fabric in which conductive fibers having electrical conductivity or antistatic fibers having antistatic properties are woven, wherein the front curtain airbag device is provided. The front curtain airbag device according to claim 8,
A front curtain airbag device comprising an earth circuit connected to the conductive fiber and electrically grounded. A driver's airbag body that is formed on a steering wheel of an automobile, which consists of a bag body sewn on a base fabric,
A front curtain airbag body provided in the vicinity of the upper portion of the windshield so as to be inflated and deployed along the windshield of the automobile,
First inflator means for injecting a pressure fluid for inflating and deploying the driver's airbag body;
An airbag system comprising: a second inflator for ejecting a pressure fluid for inflating and deploying the front curtain airbag body. A passengers airbag body provided in an instrument panel of an automobile, comprising a bag body sewn on a base fabric;
A front curtain airbag body provided in the vicinity of the upper portion of the windshield so as to be inflated and deployed along the windshield of the automobile,
Third inflator means for ejecting pressure fluid for inflating and deploying the passengers airbag body;
An airbag system comprising: a second inflator for ejecting a pressure fluid for inflating and deploying the front curtain airbag body.

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